I usually don't care for re-wrapping my batteries but they have been used lately in my pocket a lot so i re-wrapped all my 21700 with those and they look funky but fit perfectly and seem durable.

they fit TV-12 prince and reload style RTA. you can tell it improves flavor a bit over the open flow 810 drip tip. On top of all of that you can actually pick the color no random colors and they come excellently packed.

This is my 3rd color, all of them are good. The pin can get stuck sometimes but nothing major just press it back in with hand then put the tank on top again. I like them they cool my rtas fast.

I really like those melo tanks for low wattage, cool vape, and low juice consumption. If you want something to chain vape and produce clouds go for the ello tanks(smok babybeast t8 coils for vapor production/ HW4 for flavor) very similar just bigger coils. this tank is very well machined and doesn't leak at all. I have them all for very small set ups for my friends who are just looking to not smoke cigs. and they can always find coils since it is compbatible with multiple ones. this is not a could machine (although you do get decent clouds ) or high wattage tank. it is nice well rounded tank.

this is one of the best RTAs on the market, really easy to wick and use. Everyone knows how well this tank preforms already, I will just comment on the build quality. The threads and machining on this tank are excellent. everything fits nice and tight no leaking or stuck threads. The logo is actually engraved on this one, just not gold plated. the building deck is gold plated.